Effects of physicochemical soil properties of five agricultural soils on herbicide soil adsorption and leaching

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dc.contributor.authorAlister, Claudio
dc.contributor.authorAraya, Manuel
dc.contributor.authorKogan, Marcelo
dc.date.accessioned2022-11-17T12:08:03Z
dc.date.available2022-11-17T12:08:03Z
dc.date.issued2011
dc.description.abstractOnce pesticides reach the soil, there are several factors that affect their soil behavior. To identify the principal soil and herbicide properties that control their adsorption and leaching, a study of five Chilean agricultural and forest soils was performed. Simazine, diuron, terbuthylazine and MCPA were applied to the top of 45-cm tall by 12-cm diameter disturbed soil columns, filled with either an Andisol, Ultisol, Entisol or one of two Inceptisol soils. After herbicide applications, each lysimeter received 24 mm of simulated rain every 24 hours for five days. Once water percolation stopped, the lysimeters were divided into five sections and herbicide concentrations were quantified using High Pressure Liquid Chromatography. Relationships between soil physicochemical properties, herbicide sorption (adsorption and desorption) and herbicide leaching were determined. All herbicides exhibited the least depth reached from the Andisol soil (10 cm) and the highest from the Ultisol soil (45 cm). The principal soil property that affected herbicide adsorption was the soil organic carbon content, specifically the fulvic acid-humins fraction. Soil leaching was related to the inverse of soil adsorption (1/Kd), cation exchange capacity, humic substances content and herbicide pKa. These results suggest that it is possible to develop simple quantitative models to predict the soil-leaching properties of pesticides.es_ES
dc.identifier.issn0718-1620
dc.identifier.other10.4067/S0718-16202011000200010
dc.identifier.urihttps://hdl.handle.net/20.500.12536/1868
dc.language.isoenes_ES
dc.sourceCiencia e Investigación Agrariaes_ES
dc.subjectDiurones_ES
dc.subjectFulvic acidses_ES
dc.subjectHumic substanceses_ES
dc.subjectMCPAes_ES
dc.subjectTriazineses_ES
dc.titleEffects of physicochemical soil properties of five agricultural soils on herbicide soil adsorption and leachinges_ES
dc.typeArtículo de revistaes_ES
uvm.carreraAgronomíaes_ES
uvm.escuelaEscuela de Ciencias Agrícolas y Veterinariases_ES
uvm.indexScieloes_ES
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